Rank	Countries/Territories	Count	Percent
1	United States	254	33.2%
2	China	151	19.8%
3	Germany	66	8.6%
4	Canada	26	3.4%
5	India	21	2.7%
6	Korea, Republic of	19	2.5%
7	United Kingdom	18	2.4%
8	Mexico	17	2.2%
9	Japan	16	2.1%
10	France	14	1.8%
11	Norway	14	1.8%
12	Poland	10	1.3%
13	Iran, Islamic Republic of	10	1.3%
14	Ireland	10	1.3%
15	Netherlands	9	1.2%
16	Philippines	9	1.2%
17	Australia	8	1%
18	Pakistan	6	0.8%
19	Serbia	5	0.7%
20	Greece	5	0.7%
21	Indonesia	4	0.5%
22	Italy	4	0.5%
23	Iraq	4	0.5%
24	Austria	4	0.5%
25	South Africa	4	0.5%
26	Malaysia	4	0.5%
27	Turkey	3	0.4%
28	Uzbekistan	3	0.4%
29	Belgium	3	0.4%
30	Brazil	3	0.4%
31	Cyprus	3	0.4%
32	New Zealand	3	0.4%
33	Hong Kong	2	0.3%
34	Kuwait	2	0.3%
35	Denmark	2	0.3%
36	Egypt	2	0.3%
37	Bulgaria	2	0.3%
38	United Arab Emirates	2	0.3%
39	Switzerland	2	0.3%
40	Singapore	2	0.3%
41	Portugal	2	0.3%
42	Qatar	2	0.3%
43	Russia	2	0.3%
44	Saudi Arabia	1	0.1%
45	Spain	1	0.1%
46	Sweden	1	0.1%
47	Taiwan	1	0.1%
48	Ukraine	1	0.1%
49	Argentina	1	0.1%
50	Belize	1	0.1%
51	Azerbaijan	1	0.1%
52	Ghana	1	0.1%
53	Ecuador	1	0.1%
54	Nigeria	1	0.1%
55	Guam	1	0.1%